The digital currency has slumped about 27 percent from its record $19,511 reached on Dec. 18, when CME Group Inc. introduced its futures contract. While bitcoin’s debut on regulated derivatives exchanges in Chicago was thought to have given it a new mainstream channel for investors to tap, so far trading volume has been limited.

“Short-term support is about $13,500 — we’ve hit that the last couple of trading sessions,” Chris Gersch, director of strategy at alternative investment management firm Bell Curve Capital LP in Chicago, said on Bloomberg Television. “Ultimately I think it moves lower and tests last week’s lows around $12,400 in the futures contract,” he said, referring to the CME version.

The South Korean government has been among the loudest voices of concern about a possible speculative bubble in the largest cryptocurrency, which is still up about 1,500 percent for the year. The country is something of a bellwether for global demand, with South Koreans paying premiums about 20 percent over prevailing international rates as of Friday.